package com.sky.controller.user;

import com.sky.entity.Category;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("dishUserController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    @ApiOperation("根据分类id查询菜品")
    @GetMapping("/list")
    public Result<List<DishVO>> list(Long categoryId){
        log.info("根据分类id查询菜品: {}", categoryId);
        // 查询缓存看是否有分类id对应的菜品信息
        String key = "dish_" + categoryId;
        List<DishVO> dishVOS = (List<DishVO>) redisTemplate.opsForValue().get(key);

        // 如果有缓存，则直接返回
        if (dishVOS != null && !dishVOS.isEmpty()){
            return Result.success(dishVOS);
        }

        // 如果没有缓存则查询MySQL，并将查询结果存入缓存
        dishVOS = dishService.selectWithFlavorsByCategoryId(categoryId);
        redisTemplate.opsForValue().set(key, dishVOS);
        return Result.success(dishVOS);
    }
}
